Investment in Unconsolidated Entities (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($) retail_center entity	Dec. 31, 2023 USD ($) investment power_plant	Dec. 31, 2022 USD ($) power_plant
Equity method investments:
Equity method, Carrying value		$ 74,659,000	$ 68,901,000
Other equity investments:
Other equity investments, carrying value		15,717,000	22,991,000
Investment in unconsolidated entities		$ 90,376,000	$ 91,892,000
Number of publicly traded investments | investment		0
Carrying value over (under) equity in net assets		$ 0
Equity interests in two natural gas power plants
Equity method investments:
Number of natural gas power plants | power_plant		2	2
Equity method, Carrying value		$ 52,230,000	$ 46,618,000
Investor entity which owns equity in an online real estate company
Equity method investments:
Equity method, Participation / Ownership %		50.00%
Equity method, Carrying value		$ 5,575,000	5,457,000
Equity interest in a residential mortgage originator
Equity method investments:
Equity method, Carrying value		0	1,449,000
Various
Equity method investments:
Equity method, Carrying value		$ 16,854,000	15,377,000
Other equity investments:
Investment in unconsolidated entities	$ 7,300,000
Number of investor entities | entity	2
Number of shopping malls | retail_center	2
Equity interest in a servicing and advisory business
Other equity investments:
Cost method, Participation / Ownership %		2.00%
Other equity investments, carrying value		$ 12,955,000	12,955,000
Investment funds which own equity in a loan servicer and other real estate assets
Other equity investments:
Other equity investments, carrying value		$ 842,000	940,000
Investor entities which own equity interests in two entertainment and retail centers
Other equity investments:
Cost method, Participation / Ownership %		15.00%
Other equity investments, carrying value		$ 146,000	7,322,000
Received a capital distribution		54,900,000
Decrease in carrying value		47,700,000
Reduction in equity interests		7,200,000
Various
Other equity investments:
Other equity investments, carrying value		$ 1,774,000	$ 1,774,000
Minimum
Other equity investments:
Cost method, Participation / Ownership %		4.00%
Minimum | Equity interests in two natural gas power plants
Equity method investments:
Equity method, Participation / Ownership %		10.00%
Minimum | Various
Equity method investments:
Equity method, Participation / Ownership %		20.00%
Minimum | Various
Other equity investments:
Cost method, Participation / Ownership %		1.00%
Maximum
Other equity investments:
Cost method, Participation / Ownership %		6.00%
Maximum | Equity interests in two natural gas power plants
Equity method investments:
Equity method, Participation / Ownership %		12.00%
Maximum | Various
Equity method investments:
Equity method, Participation / Ownership %		50.00%
Maximum | Various
Other equity investments:
Cost method, Participation / Ownership %		3.00%